Dresden 2014 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 73: Organic electronics and photovoltaics IV (organized by CPP)

HL 73.6: Talk

Wednesday, April 2, 2014, 16:30–16:45, ZEU 260

Micro-structured organic field effect transistor on commercial poly(urethane) resin as substrate and gate dielectric — Jan Hartel, Derck Schlettwein, and •Christopher Keil — Institute of Applied Physics, Laboratory of Materials Research, Justus-Liebig-University Giessen, Germany.

Dielectric layers of a commercial cross-linked poly (urethane) (PU) were prepared on a conductively coated film and served as gate dielectric and as substrate for the growth of an organic semiconductor film in an alternative approach to all-organic field effect transistors (OFET). A method was developed to process micro-structured electrodes on top of the PU dielectric layer which proved superior to the traditional lift-off-procedure. The influence of the aspect ratio of the electrodes within the organic transistor on a given dielectric layer will be discussed with respect to the calculation of the relative permittivity and the gate capacitance. A method is proposed to compensate short electrode effects which would otherwise lead to an underestimation of the gate capacitance and hence to a miscalculation of the OFET properties.